Inverse modelling of the reversely magnetized, shallow plumbing system hosting oil reservoirs of the Auca Mahuida volcano (Payeina retroarc, Neuquén Basin, Argentina)

dc.creatorPaine, John
dc.creatorDe Ritis, Riccardo
dc.creatorVentura, Guido
dc.creatorLongo, Laura Mariana
dc.creatorRavat, Dhananjay
dc.creatorSperanza, Fabio
dc.creatorChiappini, Massimo
dc.date2016
dc.date2021-10-12T15:23:08Z
dc.date.accessioned2023-07-15T03:34:35Z
dc.date.available2023-07-15T03:34:35Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/126468
dc.identifierissn:0956-540X
dc.identifierissn:1365-246X
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7466235
dc.descriptionThe Auca Mahuida volcano (2.03–0.88 Ma) located east of the Andean thrust front in the; Neuqu´en basin (Argentina) hosts an oil system of thermogenic origin and is affected by the; NW–SE striking-faults. Intrusive bodies and the underlying Jurassic sediments constitute the; reservoir rocks. Aeromagnetic data collected in the Auca Mahuida area detected multiple; dipolar magnetic anomalies, many of which have reverse polarity. Palaeomagnetic measurements; on rock samples collected in the field together with available age determinations indicate; that the reversely magnetized sources were mainly emplaced during the Matuyama reverse; polarity chron while the normal polarity sources were emplaced during the Olduvai and/or; Jaramillo subchrons. The location and geometry of the intrusive bodies is poorly known and; the customary magnetic inversion is rendered difficult because of multiple natural remanent; magnetization directions. To address these difficulties, a voxel inversion was applied to model; the vector residual magnetic intensity (VRMI) transformation of the observed total magnetic; intensity data. The modelling showed a 1.5 km deep, subcircular ring-shaped intrusion below; the summit of the volcano and a series of NW–SE elongated, fault-controlled intrusive bodies; to depths up to 3–4 km. Our results show that magnetic data and VRMI modelling help resolve; the geometry of the shallow plumbing system of volcanoes with remanently magnetized; sources, and estimate the depth and geometry of potential oil reservoirs in volcanic areas.
dc.descriptionFacultad de Ciencias Astronómicas y Geofísicas
dc.formatapplication/pdf
dc.format852-867
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rightsCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.subjectGeología
dc.subjectFísica
dc.subjectMagnetic anomaly: modelling and interpretation
dc.subjectInverse theory
dc.subjectGas and hydrate systems
dc.subjectBackarc basin processes
dc.subjectPhysics of magma and magma bodies
dc.subjectSouth America
dc.titleInverse modelling of the reversely magnetized, shallow plumbing system hosting oil reservoirs of the Auca Mahuida volcano (Payeina retroarc, Neuquén Basin, Argentina)
dc.typeArticulo
dc.typeArticulo


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